Dough-kneading machine.



PATBNTED AUG. M, 1906.

H. KIRGHER.

DOUGH KNEADING MACHINE.

I No. 828,609.

APPLICATION FILED MAY 1l. 1905.

3 SHEETS-SHEET l.

N0. 828,609. PATENTED AUG. 14, 1906. H. KIRGHER.

DOUGH KNEADING MACHINE.

AYPLIOATION FILED MAY 11. 1905.

3 SHEETS-SHEET 2.

PATENTED AUG. 14, 1906.

H. KIRCH-BR.

DOUGH KNBADING MACHINE.

APPLICATION FILED MAY'll. 1905.

3 SHEETS-SHEET 3.

UNrrEn sfrnrns PATENT CFFICEo HEIN RlCH KIRCH ER, OF CANNSTATT, GERMANY, ASSIGNCR. TO THE FIRM OF CAN N STATT ER i\lIS( .H-UND KNETMASCHI NEN- FA BRI K. CANNS'lA'lTER DA MPFBACKOFEN -FABRIIQ WERNER & PFLElDERER, CF CANNS'lATT,

GERMANY.

Specification of Letters Patent Patented Aug. 14, 1906.

Application filed May 1l, 1905. Serial No. 260,054;

The object of the present invention is to do away with these drawbacks and to remove the dough-dish without taking off the kneading-arm previously. The realization of this idea necessitates a special construction of 1evers and guide-rods which impart a certain movement to the kneading-arm, which construction forms a characteristic of the present invention. The arrangement of the levers and guide-rods of the kneading-machine is such as to give a good outer appearance to the machine and to restrict the spacewhichy it occupies.

The lmeading-machine is represented on the accompanying drawin s, in which- Figure 1 isf'a sectional e evation of the machine. Fig. 2 isa plan view. Fig. 3 is a view of the machine' in the direction of the arrow e, Fig. 1; Fig( 4, a side elevation, partly in section, of t Ae machine; and Fig. 5 is a section taken on the line c d of Fig. 4.

The construction and the working of the machine are as follows:

The machine may be operated from a power-shaft, or it may be directly coupled to a suitable motor. The pulle 1 rotates the toothed wheels 2l and 3, meshing with each other. To the wheel 3which turns on shaft B, is secured the. crank-pin C, which is engaged by the knfeading-arm C D E. To make the end of the kneading-arm describe the curve shownin Fig. 1a s ecial arrangement of levers and guide-ro s is necessary. Cn both sides of the dough-dish the arms A F, Fig. 4, are arran ed, which are connected by a common sha` 4 and oscillate round point A into the positions denominated I and II in Fig. 1. On the common shaft 5 the levers D F are on both sides of the dough-dish rigidly connected to the kneading-arm C D E and extend over the dough-dish 12 in form of a bow. The levers D F are at F rotatably connected with the levers A F to constitute toggles. lt may be remarked that this bow F D D F if sufficiently strongly constructed, may also be arranged on one side only and. that the form of a 1 was shown here only for reasonsof suitability'. Experiments made with several positions of the fulcrums and connectionepoints of the arms A F have shown that when the form of curve described by the end of the kneading-arm shown in Fig. 1 is retained, While the distance between the arms A F, the cranks C B, and the doughdish 12 is increased, the machine becomes in- 7p conveniently long and cannot well be conveniently used, because it would occupy too much room. For this reason the part of a circle described' by the ends of the levers A F is laid for the greatest part thereof into the plane of the dough-dish and the crank C D is arranged as near as possible to the doughdish 12, which arran ement permits a compact construction of t e machine. A pulley 7 is arranged on the shaft 6, which rotates the worm l() and the worm-'wheel 11 by means of the pulle 8 on the shaft 9, and thereby rotates the ough-dish during knead- 1n 2(its the kneading-arm C D E and the arms D F are firmly secured `to a common shaft 5, it will readil be understood that the operative end E o the kneading-arm will describe the curve showny b `dotted lines in Fig. 1. Theinoperative enc of the kneading-arm describes a circle around shaft B, and thus causes the kneading-arm C D E to oscillate around the vpivots F, which in turn oscillate around shaft 4. -The pla of the levers A F, which support the knea ine-arm, is limited by the movement of the end() of the kneading-arm. The combined movement of the end Cand levers D F will thus cause the end E to describe the curve desired. The end ofV the arm first moves along theilat bottom of roo Jthe dough-dish with comparatively slow speed, then rises slowly upward and moves most rapidly forward and downward imme, diately after reaching its climax. This curve,

or the corresponding movement of the end of the kneading-arm, fulfils the requirement absolutely necessary for many doughs, es ecially doughs for White bread-namely, t at ythe dough is raised high and thereby drawn out and then falls back from a comparatively great height into the dough-dish. This movement completely resembles the Work of the bakers hands, which make a similar movement to get a loose dough infiltrated With air, which operation is called to knea'd air into the dough. When the end E ofthe kneading-arm is at its climax and the machine has been stopped, the dough-dish may be removed.

I claim- 1. A dough-kneading machine provided l `the arm, substantially as specified.

with a kneading-arm, means for imparting a circular movement to one end of said arm, and` a toggle-lever operatively connected to 2. A dough-kneading machine provided with a shaft, a kneading-arnl secured thereto, means for imparting a circular movement to one end of the kneading-arm, and to Y fle-le specified. v A.

In Witness whereof I'have hereunto si ned my name inthe presence of two subscri ing Witnesses.

HEINRICH KIRCHER.

Witnesses:

FRANZ PURCH, ERNST ENTENMAN.

eY ,25 vers supporting the shaft, substantially as 

